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#include "llvm/Bitcode/BitcodeWriter.h"
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#include "llvm/IR/CallingConv.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/IRPrintingPasses.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/IR/Verifier.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/raw_ostream.h"
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#include <stdio.h>
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using namespace llvm;
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Module *makeLLVMModule( LLVMContext &Context );
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int main( int argc, char **argv )
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{
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LLVMContext Context;
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Module *Mod = makeLLVMModule( Context );
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raw_fd_ostream r( fileno( stdout ), false );
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verifyModule( *Mod, &r );
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// Prints the module IR
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ModulePass *m = createPrintModulePass( outs(), "Module IR printer" );
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legacy::PassManager PM;
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PM.add( m );
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PM.run( *Mod );
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// Write IR to a bitcode file
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FILE *mul_add_file = fopen( "mul_add.bc", "w+" );
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raw_fd_ostream bitcodeWriter( fileno( mul_add_file ), true );
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WriteBitcodeToFile( *Mod, bitcodeWriter );
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delete Mod;
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return 0;
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}
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Module *makeLLVMModule( LLVMContext &Context )
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{
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Module *mod = new Module( "mul_add", Context );
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FunctionCallee mul_add_fun =
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mod->getOrInsertFunction( "mul_add", Type::getInt32Ty( Context ), Type::getInt32Ty( Context ),
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Type::getInt32Ty( Context ), Type::getInt32Ty( Context ) );
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Function *mul_add = cast< Function >( mul_add_fun.getCallee() );
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mul_add->setCallingConv( CallingConv::C );
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Function::arg_iterator args = mul_add->arg_begin();
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Value *x = args++;
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x->setName( "x" );
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Value *y = args++;
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y->setName( "y" );
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Value *z = args++;
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z->setName( "z" );
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BasicBlock *block = BasicBlock::Create( Context, "entry", mul_add );
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IRBuilder<> builder( block );
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Value *tmp = builder.CreateBinOp( Instruction::Mul, x, y, "tmp" );
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Value *tmp2 = builder.CreateBinOp( Instruction::Add, tmp, z, "tmp2" );
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builder.CreateRet( tmp2 );
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return mod;
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}
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